Abstract

The idea that all strongly interacting particles are nonelementary in the technical sense of not being associated with quantized wave fields is a very attractive one. The possibility of associating such particles with trajectories of so-called Regge poles of the S matrix regarded as an analytic function of a complex angular momentum has been widely discussed.(1-4) Unfortunately, it has not yet been possible to establish theoretically any of the "desired" properties of Regge trajectories in a relativistic theory.